Document Detail

The Modulation of Operant Variation by the Probability, Magnitude, and Delay of Reinforcement.
MedLine Citation:
PMID:  21731111     Owner:  NLM     Status:  Publisher    
Recent studies have demonstrated that the expectation of reward delivery has an inverse relationship with operant behavioral variation (e.g., Stahlman, Roberts, & Blaisdell, 2010). Research thus far has largely focused on one aspect of reinforcement - the likelihood of food delivery. In two experiments with pigeons, we examined the effect of two other aspects of reinforcement: the magnitude of the reward and the temporal delay between the operant response and outcome delivery. In the first experiment, we found that a large reward magnitude resulted in reduced spatiotemporal variation in pigeons' pecking behavior. In the second experiment, we found that a 4-s delay between response-dependent trial termination and reward delivery increased variation in behavior. These results indicate that multiple dimensions of the reinforcer modulate operant response variation.
W David Stahlman; Aaron P Blaisdell
Publication Detail:
Journal Detail:
Title:  Learning and motivation     Volume:  42     ISSN:  0023-9690     ISO Abbreviation:  -     Publication Date:  2011 Aug 
Date Detail:
Created Date:  2011-7-6     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0247267     Medline TA:  Learn Motiv     Country:  -    
Other Details:
Languages:  ENG     Pagination:  221-236     Citation Subset:  -    
Department of Psychology, University of California, Los Angeles.
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Grant Support
R01 NS059076-07//NINDS NIH HHS

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